Question

7litres of petrol cos t £3.50. Find the cost of 23 litresof petrol of the same grade.

Answer 1

£11.50

Explanation:

7litres of petrol cos t £3.50. The cost of 1 liter will be:

= £3.50/7

= £0.50

The cost of 23 litres of petrol of the same grade will be:

= £0.50 × 23

= £11.50